Figure 4

Relative explanatory power of environmental variation in SEVM regressions. Result of spatial regressions of size and uncorrected (u.) and size-corrected (sc.) shape variation on environmental variables (a) or on environmental and genetic variables (b). The proportion of variance explained exclusively by each set of predictors as well as the shared explained variance (i.e., combined effect of spatial and environmental in (a), combined effect of spatial, genetic, and environmental effects in (b)) is presented. The total variance explained is given on top of each bar. Note that in the shape analyses, the data depicted correspond to the overall variance explained (i.e., weighted sum of the variance explained in the regressions for each shape PC retained, see Methods, with weights determined by the proportion of variance explained by each shape PC).